Gemini
| Gemini | |||||||||
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| Pattern type | Spaceship | ||||||||
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| Number of cells | 846278 | ||||||||
| Bounding box | 4217807 × 4220191 | ||||||||
| Direction | Oblique | ||||||||
| Slope | 5 | ||||||||
| Period | 33699586 (mod: 33699586) | ||||||||
| Speed | (2560,512)c/16849793 | (5120,1024)c/33699586 | ||||||||
| Heat | Unknown | ||||||||
| Kinetic symmetry | n | ||||||||
| Discovered by | Andrew J. Wade | ||||||||
| Year of discovery | 2010 | ||||||||
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Gemini is the first oblique spaceship to be constructed, and was created by Andrew J. Wade in 2010.[1][2] It displaces itself by 5,120 cells vertically and 1,024 cells horizontally every 33,699,586 generations, and is therefore an ibisship. It derives its name from the latin, gemini, meaning twins, describing its 2 identical halves, each of which contains three Chapman-Greene construction arms.[3] A tape of gliders continually relays between the two halves, instructing each to delete its parent and construct a daughter configuration.
It was the largest spaceship in terms of its diameter and bounding box, having a much smaller population than the Caterpillar. It was beaten by Annelid in both in 2026.
The pattern marks the thirteenth explicitly-constructed spaceship velocity, but facilitates an infinite range of related velocities. For example, Dave Greene has reduced its period by eight generations, whilst maintaining its displacement. Theoretically speaking, a Gemini-esque spaceship could be constructed with any velocity slower than (but not equal to) (1,1)c/580.[4] In June 2010, Greene also constructed slope-2 and slope-3 versions of the spaceship.[5][6]
Gemini was voted Pattern of the Year for 2010 on the ConwayLife.com forums.[7]
Videos
Pattern files
See also
References
- ↑ Oblique Life spaceship created at Game of Life News. Posted by Adam P. Goucher on May 19, 2010.
- ↑ Andrew J. Wade (May 18, 2010). Universal Constructor Based Spaceship (discussion thread) at the ConwayLife.com forums
- ↑ Dave Greene (February 4, 2022). Re: Thread for basic questions (discussion thread) at the ConwayLife.com forums
- ↑ Adam P. Goucher (May 21, 2010). "Universal Constructor Based Spaceship". Retrieved on May 21, 2010.
- ↑ Dave Greene (June 13, 2010). Re: Shrinking Gemini: Four Ideas (discussion thread) at the ConwayLife.com forums
- ↑ Dave Greene (June 14, 2010). Re: Shrinking Gemini: Four Ideas (discussion thread) at the ConwayLife.com forums
- ↑ Adam P. Goucher (January 17, 2011). Re: Votes for Pattern of the Year 2010 (discussion thread) at the ConwayLife.com forums
External links
- Gemini at the Life Lexicon
- New Scientist: First replicating creature spawned in life simulator
- Gemini guns at Game of Life News. Posted by Adam P. Goucher on July 30, 2010.
- downloadable zip of the Gemini RLE file (Google is not allowing to download the file, but you can Share->Email as attachment to yourself)
- Gemini RLE file with programs used to construct it (on Google docs so download quota may be exceeded by the time you attempt download.)
- Gemini RLE file with programs used to construct it (alternate download on drop.io)
- Patterns
- Spaceships with between 100,000 and 999,999 cells
- Periodic objects with minimum population between 100,000 and 999,999
- Patterns with between 100,000 and 999,999 cells
- Patterns found by Andrew J. Wade
- Patterns found in 2010
- Patterns that can be constructed with 1,000 or more gliders
- Outer-totalistically endemic patterns
- Spaceships
- Spaceships with period 33699586
- Oblique spaceships
- Spaceships with slope 5
- Spaceships with speed (2560,512)c/16849793
- Spaceships with unsimplified speed (5120,1024)c/33699586
- Spaceships with mod 33699586
- Spaceships with n symmetry
- Pattern of the Year top contenders
- Pattern of the Year winners
- Universal constructors
- Adjustable spaceships
- Macro-spaceships